Published September 1, 2009
| Version v1
Journal article
Measurement of the γγ*→π0 transition form factor
Creators
- Aubert, B.1
- Karyotakis, Y.1
- Lees, J. P.1
- Poireau, V.1
- Prencipe, E.1
- Prudent, X.1
- Tisserand, V.1
- Garra Tico, J.2
- Grauges, E.2
- Martinelli, M.3, 4
- Palano, A.3, 4
- Pappagallo, M.3, 4
- Eigen, G.5
- Stugu, B.5
- Sun, L.5
- Battaglia, M.6
- Brown, D. N.6
- Kerth, L. T.6
- Kolomensky, Yu. G.6
- Lynch, G.6
- and others
- BABAR Collaboration
- 1. Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Universite de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux (France)
- 2. Facultat de Fisica, Departament ECM, Universitat de Barcelona, E-08028 Barcelona (Spain)
- 3. Dipartimento di Fisica, Universita di Bari, I-70126 Bari (Italy)
- 4. INFN Sezione di Bari, I-70126 Bari (Italy)
- 5. Institute of Physics, University of Bergen, N-5007 Bergen (Norway)
- 6. Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)
Description
We study the reaction e+e-→e+e-π0 in the single tag mode and measure the differential cross section dσ/dQ2 and the γγ*→π0 transition form factor in the momentum transfer range from 4 to 40 GeV2. At Q2>10 GeV2 the measured form factor exceeds the asymptotic limit predicted by perturbative QCD. The analysis is based on 442 fb-1 of integrated luminosity collected at PEP-II with the BABAR detector at e+e- center-of-mass energies near 10.6 GeV.
Additional details
Identifiers
- DOI
- 10.1103/PhysRevD.80.052002;
- arXiv
- arXiv:0905.4778v1;
Publishing Information
- Journal Title
- Physical Review. D, Particles Fields
- Journal Volume
- 80
- Journal Issue
- 5
- Journal Page Range
- p. 052002-052002.16
- ISSN
- 0556-2821
- CODEN
- PRVDAQ
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 41063674
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- ASYMPTOTIC SOLUTIONS; CENTER-OF-MASS SYSTEM; DIFFERENTIAL CROSS SECTIONS; ELECTRON-POSITRON INTERACTIONS; FORM FACTORS; GAMMA RADIATION; GEV RANGE 01-10; LUMINOSITY; MOMENTUM TRANSFER; PEP STORAGE RINGS; PHOTONS; PIONS NEUTRAL; QUANTUM CHROMODYNAMICS
- Descriptors DEC
- BOSONS; CROSS SECTIONS; DIMENSIONLESS NUMBERS; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; ENERGY RANGE; FIELD THEORIES; GEV RANGE; HADRONS; INTERACTIONS; IONIZING RADIATIONS; LEPTON-LEPTON INTERACTIONS; MASSLESS PARTICLES; MATHEMATICAL SOLUTIONS; MESONS; OPTICAL PROPERTIES; PARTICLE INTERACTIONS; PARTICLE PROPERTIES; PHYSICAL PROPERTIES; PIONS; PSEUDOSCALAR MESONS; QUANTUM FIELD THEORY; RADIATIONS; STORAGE RINGS
Optional Information
- Notes
- (c) 2009 The American Physical Society
- Collaborations
- BABAR Collaboration